Here is are some photo's of my collection
of:

electricity meter or energy
meter (kWh)

Drehstromzähler und Wechselstrohmzähler

Note:
An electricity meter or energy meter is a device
that measures the amount of electric
energy consumed by a residence, business,
or an electrically powered device.Electricity meters are
typically calibrated in billing units, the most common one
being the kilowatt hour [kWh]. Periodic readings of electric meters
establishes billing cycles and energy used during a cycle.